wbtcw.com.		30 IN SOA ns1.bdydns.cn. sa.dudns.com. (
				2018010142 ; serial
				5          ; refresh (5 seconds)
				5          ; retry (5 seconds)
				2592000    ; expire (4 weeks 2 days)
				3600       ; minimum (1 hour)
				)

Name servers:
wbtcw.com.		30 IN NS ns2.bdydns.cn.
wbtcw.com.		30 IN NS ns1.bdydns.cn.